fix: Use pre-installed Rust tools instead of downloading

- Remove Install Rust step (pre-installed in /root/.cargo/bin)
- Remove Install sccache step (pre-installed)
- Use pre-installed tools path instead

.forgejo/workflows/botserver.yaml

@@ -61,13 +61,12 @@ jobs:
           sudo apt-get update -qq
           sudo apt-get install -y libpq-dev libssl-dev liblzma-dev pkg-config
 
-      - name: Install Rust
+      - name: Setup PATH for pre-installed tools
         run: |
-          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable --profile minimal
           echo "$HOME/.cargo/bin" >> $GITHUB_PATH
+          echo "/usr/local/bin" >> $GITHUB_PATH
 
-      - name: Install sccache
-        run: |
+      - name: Build BotServer
           if [ ! -f $HOME/.cargo/bin/sccache ]; then
             wget -q https://github.com/mozilla/sccache/releases/download/v0.8.2/sccache-v0.8.2-x86_64-unknown-linux-musl.tar.gz
             tar xzf sccache-v0.8.2-x86_64-unknown-linux-musl.tar.gz